Family socioeconomic status (SES), structure, and parental behaviors have been identified as important determinants of children's body mass index (BMI) in developed countries; however the role of these factors in other settings is not clear. We examined the role of family and household characteristics on BMI among 4,484 children 5 to 18 years measured in the 2005 Colombian Nutrition Survey 2005. We used 2‐ level hierarchical linear models with family as level 2, child as level 1, and BMI (continuous) as outcome. The family level explained 20% of variability in BMI. SES (difference 0.4 kg/m2in highest WI quintile vs. lowest), and caregiver education (0.02 kg/m2 per year of schooling) and overweight (0.5 kg/m2vs. normal) and obesity (1.3 kg/m2vs. normal) were positively associated with child BMI (all p<0.01). While living in an extended family was associated with 0.3 kg/m2increase in BMI, the number of family members was inversely associated with BMI (−0.1 kg/m2 per member). The association between parental weight status and child BMI is similar to that described in developed countries; however, the positive relationship between SES (WI and education) and BMI differs from developed country settings. This study identified important family and household predictors of BMI in Colombian children.
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